The Fami-Card turns an NES cart into an NES

Console modder la grenouilleKotomi has managed to cram an entire NES inside a disemboweled Super Mario Bros. cart. Christened the Fami-Card, Kotomi's hack uses one of those cheap Chinese NES-on-a-Chip knockoffs to run the games, and even finds space to cram in a cartridge slot, video and audio out and two joystick ports.

This is fantastic, but someone needs to take Kotomi's work to the next level, and install a screen, speakers and a d-pad into the back of an old cartridge (preferably Blaster Master) transforming it into a standalone portable version of itself.